11.7.1 Manipulating the load path

When a function is called, Octave searches a list of directories for
a file that contains the function declaration. This list of directories
is known as the load path. By default the load path contains
a list of directories distributed with Octave plus the current
working directory. To see your current load path call the path
function without any input or output arguments.

It is possible to add or remove directories to or from the load path
using addpath and rmpath. As an example, the following
code adds ‘~/Octave’ to the load path.

addpath("~/Octave")

After this the directory ‘~/Octave’ will be searched for functions.

Built-in Function:addpath(dir1, ...)

Built-in Function:addpath(dir1, ..., option)

Add dir1, ... to the current function search path. If
option is ‘"-begin"’ or 0 (the default), prepend the
directory name to the current path. If option is ‘"-end"’
or 1, append the directory name to the current path.
Directories added to the path must exist.

See also path, rmpath, genpath, pathdef, savepath, pathsep

Built-in Function:genpath(dir)

Return a path constructed from dir and all its subdirectories.

Built-in Function:rmpath(dir1, ...)

Remove dir1, ... from the current function search path.

See also path, addpath, genpath, pathdef, savepath, pathsep

Function File:savepath(file)

Save the current function search path to file. If file
is omitted, ‘~/.octaverc’ is used. If successful,
savepath returns 0.

See also path, addpath, rmpath, genpath, pathdef, pathsep

Built-in Function:path(...)

Modify or display Octave's load path.

If nargin and nargout are zero, display the elements of
Octave's load path in an easy to read format.

If nargin is zero and nargout is greater than zero, return the
current load path.

If nargin is greater than zero, concatenate the arguments,
separating them with pathsep(). Set the internal search path
to the result and return it.

No checks are made for duplicate elements.

See also addpath, rmpath, genpath, pathdef, savepath, pathsep

Built-in Function:val = pathdef()

Return the default list of directories in which to search for function
files.

See also path, addpath, rmpath, genpath, savepath, pathsep

Built-in Function:pathsep()

Return the system-dependent character used to separate directories in
a path.

See also filesep, dir, ls

Built-in Function:rehash()

Reinitialize Octave's load path directory cache.

Built-in Function:file_in_loadpath(file)

Built-in Function:file_in_loadpath(file, "all")

Return the absolute name of file if it can be found in
the list of directories specified by path.
If no file is found, return an empty matrix.

If the first argument is a cell array of strings, search each
directory of the loadpath for element of the cell array and return
the first that matches.

If the second optional argument "all" is supplied, return
a cell array containing the list of all files that have the same
name in the path. If no files are found, return an empty cell array.